Sodium hydroxide

vapor density

>1 (vs air)

Quality Level

200

vapor pressure

<18 mmHg ( 20 °C)
3 mmHg ( 37 °C)

grade

puriss.

Assay

98-100.5%

form

pellets

quality

meets analytical specification of Ph. Eur. BP NF E524

impurities

≤0.0005% total nitrogen (N)
≤0.002% heavy metals (as Pb)
≤0.5% Na₂CO₃

mp

318 °C (lit.)

solubility

water: soluble 1260 g/L at 20 °C

density

2.13 g/cm³ at 20 °C

anion traces

chloride (Cl^–): ≤20 mg/kg
phosphate (PO₄^3-): ≤10 mg/kg
silicate (as SiO₂): ≤100 mg/kg
sulfate (SO₄^2-): ≤30 mg/kg

cation traces

Al: ≤10 mg/kg
As: ≤2 mg/kg
Ca: ≤10 mg/kg
Fe: ≤10 mg/kg
Hg: ≤1 mg/kg
K: ≤1000 mg/kg
Pb: ≤0.5 mg/kg

SMILES string

[OH-].[Na+]

InChI

1S/Na.H2O/h;1H2/q+1;/p-1

InChI key

HEMHJVSKTPXQMS-UHFFFAOYSA-M